Vibration attenuator

US11173521B2 · kind B2 · utility

Assignee

• Textron Innovations Inc. · US

Inventors

• David E. Heverly, II · Arlington, US
• Frank B. Stamps · Colleyville, US
• Gary Miller · Oosterdijk, US
• Richard E. Rauber · Arlington, US
• Thomas C. Parham, Jr. · Colleyville, US
• Michael R. Smith · Colleyville, US
• Michael Scott Seifert · Southlake, US
• Jouyoung Jason Choi · Fort Worth, US

Key dates

• Filing date: Feb 25, 2019
• Grant date: Nov 16, 2021
• Expiry date: Aug 20, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B64C2027/005
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A vibration attenuator for a rotor is rotatable about a mast axis and has a frame configured for rotation about the mast axis relative to the rotor. A first mass is axially translatable in a first direction relative to the frame parallel to a first axis, and a first biasing force urges the first mass toward a first-mass rest position in which the first mass is symmetric about the mast axis. A second mass is axially translatable in a second direction relative to the frame parallel to a second axis, and a second biasing force urges the second mass toward a second-mass rest position in which the second mass is symmetric about the mast axis. A selected first or second mass moves radially outward from the rest position to oppose vibrations in the rotor.